HEALTH STATE UTILITIES FOR PRESSURE ULCERS – A COMPARISON OF CONDITION-SPECIFIC AND GENERIC MEASURES AND TIME-TRADE-OFF (TTO)
Author(s)
Meads DM1, Czoski-Murray C1, Rutherford C2, Dealey C3, McGinnis E4, Stubbs N5, Wilson L1, Nixon J1, Hulme CT1, McCabe C6
1University of Leeds, Leeds, UK, 2University of Sydney, Sydney, Australia, 3Birmingham Hospitals NHS Trust and University of Birmingham, Birmingham, UK, 4Leeds Teaching Hospitals NHS Trust, Leeds, UK, 5Leeds Community Healthcare NHS Trust, Leeds, UK, 6University of Alberta, Edmonton, AB, Canada
OBJECTIVES To compare a newly developed condition-specific utility index (CSUI), the Pressure Ulcer Quality of Life Utility Index (PUQoL-UI) with generic and directly elicited TTO values. METHODS The PUQoL-UI was completed by a group of patients (n=100) in England with pressure ulcers (PUs) along with the EQ-5D and own health TTO. The discriminatory power of the utility measures was assessed across PU grade and health and PU severity ratings. Multivariate regression was conducted to explore determinants of utility values. RESULTS The mean sample age was 77.2 years (range 22.7-101.7), 49% were female and 50% wheelchair users. Mean (SDs) utility for superficial PUs (grades 1-2) were 0.72 (0.17), 0.70 (0.35) and 0.24 (0.16) and for severe PUs (grades 3-4) 0.67 (0.17), 0.65 (0.35) and 0.15 (0.38) for the PUQoL-UI, TTO and EQ-5D, respectively. Mean (SDs) utility by self-reported PU severity was: [Mild] 0.78 (0.16), 0.66 (0.35), 0.29 (0.36); [Moderate] 0.72 (0.17), 0.63 (0.38), 0.25 (0.34); [Severe] 0.58 (0.17), 0.70 (0.33), 0.04 (0.40) for the PUQoL-UI, TTO and EQ-5D, respectively. Regression analyses indicated both EQ-5D and PUQoL-UI values were explained by perceived severity and general health ratings but not demographics or PU grade. Duration and body part affected were additional significant explanatory factors of the EQ-5D while wheelchair use approached significance. CONCLUSIONS Values were much lower for the EQ-5D than the other assessments which may be partly explained by the range in EQ-5D and partly due to background mobility issues being captured. The PUQoL-UI appears to have good discriminatory power and is recommended for use in trials of PU interventions. The utilities presented here will be useful for decision-analytic models that incorporate PU impact. Probabilistic sensitivity analyses including the PUQoL-UI will likely generate lower levels of uncertainty than the EQ-5D due to the smaller SDs for health states.
Conference/Value in Health Info
2014-11, ISPOR Europe 2014, Amsterdam, The Netherlands
Value in Health, Vol. 17, No. 7 (November 2014)
Code
PSS39
Topic
Patient-Centered Research
Topic Subcategory
Health State Utilities
Disease
Sensory System Disorders